I'm sorry but I can't really help with those things. I actually use an external motion control board (a CSMIO-IP/M) which means that some of the parameters that are used with a parallel port do not apply and even if I gave you a copy of my settings, they might be wrong for your machine. Same for Sherline - you are more likely to find that information from a US site where Sherline is much more popular. Kernel speed - 25KHz is probably a good starting point but again, my system does not use that value anyway.

I don't want to sound unhelpful but this is reaching the point where I just do not know the answers. I have never used Mach3 in parallel port mode. Good luck!